Make schemars_derive optional

README.md

@@ -203,6 +203,7 @@ fn main() {
 `#[serde(...)]` attributes can be overriden using `#[schemars(...)]` attributes, which behave identically (e.g. `#[schemars(rename_all = "camelCase")]`). You may find this useful if you want to change the generated schema without affecting Serde's behaviour, or if you're just not using Serde.
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies

docs/4-features.md

@@ -14,6 +14,7 @@ schemars = { version = "0.6", features = ["chrono"] }
 ```
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies

schemars/Cargo.toml

@@ -13,7 +13,7 @@ categories = ["encoding"]
 build = "build.rs"
 
 [dependencies]
-schemars_derive = { version = "=0.7.4", path = "../schemars_derive" }
+schemars_derive = { version = "=0.7.4", optional = true, path = "../schemars_derive" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 
@@ -28,7 +28,11 @@ arrayvec = { version = "0.5", default-features = false, optional = true }
 pretty_assertions = "0.6.1"
 
 [features]
-impl_json_schema = []
+default = ["derive"]
+
+derive = ["schemars_derive"]
+
+impl_json_schema = ["derive"]
 # derive_json_schema will be removed in a later version
 derive_json_schema = ["impl_json_schema"]
 

schemars/src/lib.rs

@@ -197,6 +197,7 @@ fn main() {
 `#[serde(...)]` attributes can be overriden using `#[schemars(...)]` attributes, which behave identically (e.g. `#[schemars(rename_all = "camelCase")]`). You may find this useful if you want to change the generated schema without affecting Serde's behaviour, or if you're just not using Serde.
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies
@@ -230,6 +231,7 @@ pub mod gen;
 /// JSON Schema types.
 pub mod schema;
 
+#[cfg(feature = "schemars_derive")]
 pub use schemars_derive::*;
 
 // Export serde_json so schemars_derive can use it